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Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Fair value of interest rate swaps - net asset (liability) Interest Rate Fair Value Hedge Asset at Fair Value Entity Interactive Data Current Entity Interactive Data Current Finance lease, liability, current Finance Lease, Liability, Current Variable Rate [Axis] Variable Rate [Axis] Deferred tax liabilities Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Other Commitments [Axis] Other Commitments [Axis] Acquired finite-lived intangible assets, weighted average useful life Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period Discontinued Operations Discontinued Operations, Policy [Policy Text Block] Accounting Policies 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Including Discontinued Operations Depreciation, Depletion And Amortization. Including Discontinued Operations Other assets Other Assets, Noncurrent Document Type Document Type Acquisition of businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Fair value of interest rate swaps Derivative Asset, Current Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Accrued expenses and other current liabilities Accrued expenses and other current liabilities Accrued expenses and other current liabilities Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value Intangible Asset, Indefinite-Lived Intangible Asset, Indefinite-Lived [Table Text Block] Future milestone contributions Collaborative Arrangement, Future Milestone Contributions Collaborative Arrangement, Future Milestone Contributions Monitoring and related services Monitoring And Related Services [Member] Monitoring And Related Services Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Earnings Per 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revenue Contract with Customer, Liability, Noncurrent Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name First Lien Term Loan A due 2030 First Lien Term Loan A due 2030 [Member] First Lien Term Loan A due 2030 Income (loss) from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Purchase obligation, to be paid, after year four Purchase Obligation, To Be Paid, After Year Four Purchase Obligation, To Be Paid, After Year Four Commitments and contingencies (See Note 12) Commitments and Contingencies Gross Carrying Amount Intangible Asset, Finite-Lived, before Accumulated Amortization Finance lease, liability, noncurrent, statement of financial position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Finite-lived Intangible Assets [Roll Forward] Intangible Asset, Finite-Lived [Roll Forward] Allocation of income (loss) from continuing operations - diluted Net Income (Loss) from Continuing Operations Available to Common Shareholders, Diluted Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Recurring monthly revenue Recurring Monthly Revenue [Member] Recurring Monthly Revenue Share-based compensation arrangement by share-based payment award, award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Counterparty Name [Axis] Counterparty Name [Axis] Capitalized Contract Cost [Line Items] Capitalized Contract Cost [Line Items] Liabilities and stockholders' equity Liabilities and Equity [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Share-based compensation arrangement by share-based payment award, options, exercisable, weighted average remaining contractual term Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted-Average Remaining Contractual Term Trade name Trade Names [Member] Award Type [Domain] Award Type [Domain] Deferred subscriber acquisition costs Increase (Decrease) in Deferred Subscriber Acquisition Costs Increase (Decrease) in Deferred Subscriber Acquisition Costs Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Interest on lease liabilities Finance Lease, Interest Expense Schedule of Unrealized Gain (Loss) on Interest Rate Swaps Schedule of Unrealized Interest Rate Derivatives [Table Text Block] Schedule of Unrealized Interest Rate Derivatives Expected exercise term Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Treasury stock, shares, acquired (in shares) Treasury Stock, Shares, Acquired Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Noncontrolling interest, ownership percentage by noncontrolling owners Subsidiary, Ownership Percentage, Noncontrolling Owner PEO Name PEO Name Purchase obligation, to be paid, year three and four Purchase Obligation, To Be Paid, Year Three And Four Purchase Obligation, To Be Paid, Year Three And Four 2025 Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Operating lease, right-of-use asset, current Operating Lease, Right of Use Assets, Current Operating Lease, Right of Use Assets, Current Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Total other segment items Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Transfers accounted for as secured borrowings, assets, carrying amount Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount Legal Entity [Axis] Legal Entity [Axis] Other, net Segment Reporting, Other, Net, Amount Segment Reporting, Other, Net, Amount Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Proceeds (payments) from interest rate swaps Payments for (Proceeds from) Derivative Instrument, Investing Activities Treasury stock, value, acquired, cost method Treasury Stock, Value, Acquired, Cost Method October 2025 Cash Flow Hedge, Maturing 2030 October 2025 Cash Flow Hedge, Maturing 2030 [Member] October 2025 Cash Flow Hedge, Maturing 2030 Beginning balance Ending balance Ending balance Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Other accrued liabilities Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Term Loan A Due 2030 Term Loan A Due 2030 [Member] Term Loan A Due 2030 Current year gross write-offs Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Restricted cash and restricted cash equivalents Restricted Cash and Cash Equivalent, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Income (loss) from discontinued operations, net of tax, per share - basic (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share First Lien Term Loan B due 2030 First Lien Term Loan B Due 2030 [Member] First Lien Term Loan B Due 2030 Debt Instrument [Axis] Debt Instrument [Axis] Consideration transferred, paid in cash Payments to Acquire Businesses, Gross Total lease cost Lease, Cost Credit Score, FICO [Domain] Credit Score, FICO [Domain] Amounts of transaction Related Party Transaction, Amounts of Transaction LEASES Lessee, Operating Leases [Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Net income (loss) per share - basic (in dollars per share) Earnings Per Share, Basic First Lien Notes due 2027 First Lien Notes due 2027 [Member] First Lien Notes due 2027 Repurchases of common stock, including excise tax Payments for Repurchase of Common Stock Deferred revenue Contract with Customer, Liability, Current Total current assets Assets, Current Insider Trading Arrangements [Line Items] Long-term debt Long-Term Debt, Excluding Current Maturities Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net of allowance for credit losses of $73,556 and $63,841, respectively Accounts Receivable, after Allowance for Credit Loss, Current June 2025 Apollo Sale June 2025 Apollo Sale [Member] June 2025 Apollo Sale All preceding years Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff Accumulated deficit Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Amortization of deferred subscriber acquisition costs Deferred Policy Acquisition Costs, Amortization Expense Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Length of share repurchase program Share Repurchase Program, Length Of Program Share Repurchase Program, Length Of Program Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Fair Value Measurement [Domain] Fair Value Measurement [Domain] Non-deductible items, percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Operating lease cost Operating Lease, Cost Reportable Segment Reportable Segment [Member] Reportable Segment Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Expected dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Derivative Contract [Domain] Derivative Contract [Domain] Allowance for Credit Losses Receivable [Policy Text Block] Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities and stockholders' equity Liabilities and Equity Variable lease costs Variable Lease, Cost Options Share-Based Payment Arrangement, Option [Member] Reclassification from accumulated other comprehensive income, current period, before tax Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Plan Name [Axis] Plan Name [Axis] Related Party [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Additional paid-in capital Additional Paid in Capital Definite-lived intangible assets: Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] State Farm Fire & Casualty Company State Farm Fire & Casualty Company [Member] State Farm Fire & Casualty Company Dealer generated customer accounts and bulk account purchases Payments to acquire intangible assets Payments to Acquire Intangible Assets Other income (expense) Other Nonoperating Income (Expense) Repayments of senior debt Repayments of Senior Debt Tax receivables Income Taxes Receivable, Current Name Awards Close in Time to MNPI Disclosures, Individual Name Stockholders' equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Other general and administrative costs General and Administrative Expense Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Additional liabilities recognized Contract with Customer, Liability, Additional Liabilities Recognized Contract with Customer, Liability, Additional Liabilities Recognized Preferred stock—authorized 1,000,000 shares of $0.01 par value; zero issued and outstanding as of June 30, 2026 and December 31, 2025 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] First Lien Notes due 2033 First Lien Notes Due 2033 [Member] First Lien Notes Due 2033 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Long-Term Debt and Lease Obligation Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Retail Installment Contract Receivables Financing Receivable [Policy Text Block] Indefinite-lived Intangible Assets [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Other related services Other Related Services [Member] Other Related Services 2020 Receivables Facility Receivables Facility [Member] Receivables Facility Name Trading Arrangement, Individual Name Advertising costs Advertising Expense Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount 2024 Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Not designated Not Designated as Hedging Instrument [Member] Depreciation and intangible asset amortization Depreciation, Depletion and Amortization Allocation of income (loss) from continuing operations - basic Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic ADT Notes due 2042 ADT Notes due 2042 [Member] ADT Notes due 2042 [Member] Unamortized purchase accounting fair value adjustment and other Accretion of Purchase Accounting, Fair Value Adjustment, Debt Accretion of Purchase Accounting, Fair Value Adjustment, Debt SOFR Secured Overnight Financing Rate (SOFR) [Member] Right-of-use assets obtained in exchange for lease obligations - finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Purchase obligation, to be paid, year one and two Purchase Obligation, To Be Paid, Year One And Two Purchase Obligation, To Be Paid, Year One And Two Current assets: Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Right-of-use assets obtained in exchange for lease obligations - operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Next Two Years Next Two Years [Member] Next Two Years Income tax benefit (expense) Income tax expense (benefit) Income Tax Expense (Benefit) Term Loan A Facility Term Loan A Facility [Member] Term Loan A Facility Schedule of Subscriber System Asset and Deferred Subscriber Acquisition Costs of Depreciation and Amortization Schedule of Subscriber System Asset and Deferred Subscriber Acquisition Costs of Depreciation and Amortization [Table Text Block] Schedule of Subscriber System Asset and Deferred Subscriber Acquisition Costs of Depreciation and Amortization ADT ADT [Member] ADT Purchase obligation Purchase Obligation Technology Intangible Assets Technology-Based Intangible Assets [Member] Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Consolidation Consolidation, Policy [Policy Text Block] Net increase (decrease) Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Awards That Vest Based Upon Both Service Requirements And Performance Conditions Share-Based Payment Arrangement, Tranche Two [Member] First Lien Revolving Credit Facility First Lien Revolving Credit Facility [Member] First Lien Revolving Credit Facility Year before current fiscal year Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year Operating lease, liability, noncurrent, statement of financial position [Extensible Enumeration] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Restatement Determination Date: Restatement Determination Date [Axis] 2025 Share Repurchase Plan 2025 Share Repurchase Plan [Member] 2025 Share Repurchase Plan Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Company as Lessee Lessee, Leases [Policy Text Block] Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Summary of Contracts Assets Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Income (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Provision for losses on receivables and inventory Provision for Doubtful Accounts and Inventory Write-down Provision for Doubtful Accounts and Inventory Write-down Contract assets, gross Contract with Customer, Asset, before Allowance for Credit Loss DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]